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【单选题】
下列哪种激素能使阴道上皮细胞所含糖原在乳酸杆菌的作用下形成乳酸,起阴道自净作用:
A.
GnRH
B.
FSH
C.
LH
D.
雌激素
E.
孕激素
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【单选题】The following are the expressions about giving dimensions for mechanical drawing. Which one among them is correct?
A.
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B.
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C.
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【单选题】听力原文：Woman: Good morning! University Language Centre. How can l help you? Man: I'm interested in doing a language course. I did Mandarin last year and now I'd like to do Japanese. Can you give me some...
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B.
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【单选题】The following are the expressions about giving dimensions for mechanical drawing. Which one among them is correct?
A.
When the diameter of a spheres is dimensioned, the dimension line should go through the center of the sphere, and add a“φ” before the dimension figure.
B.
When a whole circle or an arc over 180°is dimensioned, a "Ø" should be added before the dimension figure.
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When a whole circle or an arc of 180°is dimensioned, a "Ø" should be added before the dimension figure.
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When a corner is dimensioned, the size of it should be indicated with diameter, and a symbol“φ”should be given before the dimension figure.
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